document.write( "Question 1058599: One part of 10.000 investment at rate 7.5%/year. The other part at rate 8.5% per year. Income from the two investments = 820. How much is the investment amount for each rate? \n" ); document.write( "
Algebra.Com's Answer #673677 by Boreal(15235)![]() ![]() You can put this solution on YOUR website! x at 0.075 \n" ); document.write( "10,000-x at 0.085 \n" ); document.write( "They add to 820 \n" ); document.write( ".075x+0.085(10,000-x)=820 \n" ); document.write( ".075x+850-0.085x=820 \n" ); document.write( "-0.01x=-30 \n" ); document.write( "multiply both sides by -100 \n" ); document.write( "x=$3000@0.075=$225 \n" ); document.write( "10,000-x=$7000@0.085=$595 \n" ); document.write( "They add to $820. \n" ); document.write( " |